Model 2035 Czerny-Turner Monochromator
for Scanning and CCD Array Spectroscopy Experimentation

At right six fiber input channels of Hg 365-nm in a higher order are shown. One row of images was selected for the spectral plot (intensity vs. wavelength). Two dimensional detectors allow acquisition of multiple spectra simultaneously and source images can be analyzed with respect to spatial and spectral features. This is accomplished either through multiple fibers (viewing different source points) or by direct imaging to the entrance slit.
Imaging with the 2035 Monochromator

The Model 2035 Czerny-Turner for imaging! The primary function of a spectrometer is to disperse arriving radiation into discrete wavelength components. By scanning the grating or mounting a multichannel detector the component spectra may be viewed and analyzed. Wavelength dispersion is viewed in one dimension of the exit focal plane (usually horizontal.) Use of two dimensional CCD detectors allows gathering additional information from the spectra at the exit focal plane.

Imaging with the 2035 Monochromator

Imaging with the 2035 Monochromator		 The Model 2035 equipped with an internal corrective optic to separate spatial input images. Up to eight 100-um diameter input fibers can be used on a 6-mm high CCD array. The internal correction optic, a swing away mirror, is mounted in the 90-degree port position. With the mirror in this optical path the Model 2035 delivers optimal imaging performance. This allows use of the axial ports for optimal spectral resolution. For more information about types of imaging optics see our page on Imaging Spectroscopy.

The Model 2035 is ideally suited for use with array detectors up to 25-mm wide. The wavelength range covered in the 25-mm focal plane varies with the grating in use.

Wavelength Range on 25-mmGrating Groove Density
800-nm
75-g/mm
400-nm
150-g/mm
200-nm
300-g/mm
100-nm
600-g/mm
50-nm
1200-g/mm
33-nm
1800-g/mm
25-nm
2400-g/mm

Spectral resolution attained with arrays may differ from that attained during scanning. For example, the Model 2035 resolves lines as closely adjacent as the 313.15 and 313.18-nm doublet when scanned with 10-um slits. Typical CCD detectors have 25-um pixels and exhibit pixel-to-pixel cross talk. In an application where the 25-um pixel is the smallest detectable wavelength increment optimal resolution may be reduced.

Back to Model 2035 Specification page.